Single-lane traffic was restored and then limited again Monday on Going-to-the-Sun Road in Glacier National Park after flooding closed the road near Lake McDonald.

The road reopened at 3 p.m. Monday to one lane of traffic. Around 5 p.m., however, Sun Road was closed again to all traffic except for travelers who had reservations at Lake McDonald Lodge or Sprague Campground.

Both lanes had been closed Monday morning after a culvert two miles from Apgar overflowed, sending water across the road, according to park spokesman Tim Rains.

Park crews still were working on clearing the culvert Monday afternoon.

The flooding closure followed heavy rains over the weekend. At higher elevations in Glacier, the precipitation fell as snow.

Rains said about six inches of snow had fallen overnight on Going-to-the-Sun Road as low as Haystack Creek, and crews were unable to resume Sun Road snowplowing on Monday.

Elsewhere in Northwest Montana, the North Fork Road is closed at Blankenship Road by flooding and the west-side road along Hungry Horse Reservoir was after trees, mud and other debris clogged a culvert a few miles south of Hungry Horse Dam.